by   May 29 2015   
Why is Google Chrome making or attempting to connect to the listed IP addresses using UDP and port 443? Typically firewalls will block unhandled packets like this. But if you're not blocking the 443 UDP what is this connection actually doing? I haven't found a good answer online searching as of this date. Maybe you can help me find the answer.

Chrome 43.x Port 443 UDP outbound traffic or connection

I haven't found the answer but have found others asking the question. 

Why when I use Google Chrome does my firewall report connection attempts to port 443 using UDP?


Personally I have no issue of allowing UDP ports and do create firewall rules to enhance my networks.

But, when I can't find online searching with Google.Com for Google Chrome reasons Chrome attempts to establish a connection using UDP to port 443 I have to guess it's a plug-in or something that should just be blocked. 

Here's my firewall list for a 2 hour monitoring session this morning from my workstation. 

I removed the duplicates to make the list shorter and IP specific. 

05/29/15 08:53 AM https/udp 216.58.219.45 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.1 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.32 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.34 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.39 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.40 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.41 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.42 Port: 443
05/29/15 08:53 AM https/udp 173.194.115.55 Port: 443
05/29/15 08:53 AM https/udp 173.194.44.23 Port: 443
05/29/15 08:53 AM https/udp 173.194.64.189 Port: 443
05/29/15 08:53 AM https/udp 173.194.79.155 Port: 443
05/29/15 08:53 AM https/udp 216.58.216.1 Port: 443
05/29/15 08:53 AM https/udp 216.58.216.14 Port: 443
05/29/15 08:53 AM https/udp 216.58.216.170 Port: 443
05/29/15 08:53 AM https/udp 216.58.216.227 Port: 443
05/29/15 08:53 AM https/udp 216.58.216.33 Port: 443
05/29/15 08:53 AM https/udp 216.58.216.46 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.193 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.194 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.194 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.195 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.199 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.200 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.206 Port: 443
05/29/15 08:53 AM https/udp 216.58.217.36 Port: 443
05/29/15 08:53 AM https/udp 216.58.218.168 Port: 443
05/29/15 08:59 AM https/udp 216.58.218.170 Port: 443
05/29/15 08:59 AM https/udp 216.58.218.173 Port: 443
05/29/15 09:00 AM https/udp 216.58.218.174 Port: 443
05/29/15 09:02 AM https/udp 216.58.218.193 Port: 443
05/29/15 09:05 AM https/udp 216.58.218.194 Port: 443
05/29/15 09:13 AM https/udp 216.58.218.195 Port: 443
05/29/15 09:13 AM https/udp 216.58.218.197 Port: 443
05/29/15 09:13 AM https/udp 216.58.218.198 Port: 443
05/29/15 09:13 AM https/udp 216.58.218.202 Port: 443
05/29/15 09:36 AM https/udp 216.58.218.206 Port: 443
05/29/15 09:36 AM https/udp 216.58.219.45 Port: 443
05/29/15 09:44 AM https/udp 64.233.160.138 Port: 443
05/29/15 09:54 AM https/udp 64.233.178.141 Port: 443
05/29/15 09:54 AM https/udp 64.233.178.147 Port: 443
05/29/15 09:54 AM https/udp 74.125.198.189 Port: 443
05/29/15 09:56 AM https/udp 74.125.224.103 Port: 443
05/29/15 10:11 AM https/udp 74.125.224.105 Port: 443
05/29/15 10:11 AM https/udp 74.125.224.107 Port: 443
05/29/15 10:11 AM https/udp 74.125.224.108 Port: 443
05/29/15 10:11 AM https/udp 74.125.224.118 Port: 443
05/29/15 10:13 AM https/udp 74.125.224.121 Port: 443
05/29/15 10:13 AM https/udp 74.125.224.124 Port: 443
05/29/15 10:13 AM https/udp 74.125.224.64 Port: 443
05/29/15 10:13 AM https/udp 74.125.224.69 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.72 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.74 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.77 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.78 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.90 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.91 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.98 Port: 443
05/29/15 10:15 AM https/udp 74.125.224.99 Port: 443
05/29/15 10:15 AM https/udp 74.125.227.165 Port: 443
05/29/15 10:15 AM https/udp 74.125.227.167 Port: 443
05/29/15 10:15 AM https/udp 74.125.227.168 Port: 443
05/29/15 10:16 AM https/udp 74.125.227.172 Port: 443
05/29/15 10:16 AM https/udp 74.125.227.173 Port: 443
05/29/15 10:19 AM https/udp 74.125.227.186 Port: 443
05/29/15 10:19 AM https/udp 74.125.227.188 Port: 443
05/29/15 10:19 AM https/udp 74.125.227.190 Port: 443
05/29/15 10:21 AM https/udp 74.125.227.193 Port: 443
05/29/15 10:23 AM https/udp 74.125.227.227 Port: 443
05/29/15 10:28 AM https/udp 74.125.227.228 Port: 443
05/29/15 10:30 AM https/udp 74.125.227.232 Port: 443
05/29/15 10:35 AM https/udp 74.125.227.233 Port: 443
05/29/15 10:36 AM https/udp 74.125.227.234 Port: 443
05/29/15 10:36 AM https/udp 74.125.227.236 Port: 443
05/29/15 10:53 AM https/udp 74.125.227.237 Port: 443
05/29/15 10:53 AM https/udp 74.125.227.238 Port: 443
05/29/15 10:55 AM https/udp 74.125.227.246 Port: 443
05/29/15 10:55 AM https/udp 74.125.227.247 Port: 443
05/29/15 11:03 AM https/udp 74.125.227.251 Port: 443
05/29/15 11:04 AM https/udp 74.125.227.254 Port: 443
05/29/15 11:19 AM https/udp 74.125.25.95 Port: 443
05/29/15 11:19 AM https/udp 74.125.28.154 Port: 443
05/29/15 11:20 AM https/udp 74.125.28.189 Port: 443

If you know the answer to why this is happening be the first to really offer valid resource links. 

Currently my firewall blocks the connection because it is not typical of any end user surfing habits. 

Thanks, 

Murray

 

Why is Google Chrome making or attempting to connect to the listed IP addresses using UDP and port 443? Typically firewalls will block unhandled packets like this. But if you're not blocking the 443 UDP what is this connection actually doing? I haven't found a good answer online searching as of this date. Maybe you can help me find the answer.